Authorities say a man killed his ex-wife and was later found dead during a murder-suicide after an hours-long standoff with authorities at his home in Carlstadt.

According to Bergen County prosecutors, a relative of Massiel Deoleo, 34, called police Saturday shortly before noon to report the Mahwah resident missing and express concerns about her well-being.

The relative said she had last been with her ex-husband, James Cox, 43, of Carlstadt. Prosecutors say Cox was a known criminal.

A standoff ensured at Cox's home on 6th Street, after which he was found dead of a gunshot wound believed to have been self-inflicted.

The woman's body was found, and authorities said they believe she was killed sometime the previous night.

Neighbors were told to shelter in place for hours during the incident.

AP wire services helped contribute to this report.